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So add support for > getting the pwrseq device if the OF graph link is present. Once obtained, > pwrseq_power_on() is called to power up the M.2 Bluetooth card. The power > sequencer descriptor is obtained via devm_pwrseq_get(), so the power-off > and cleanup are handled automatically when the device is unbound. > > Signed-off-by: Sherry Sun > --- Reviewed-by: Frank Li > drivers/bluetooth/btnxpuart.c | 14 ++++++++++++++ > 1 file changed, 14 insertions(+) > > diff --git a/drivers/bluetooth/btnxpuart.c b/drivers/bluetooth/btnxpuart.c > index e7036a48ce48..438ccaa2b56d 100644 > --- a/drivers/bluetooth/btnxpuart.c > +++ b/drivers/bluetooth/btnxpuart.c > @@ -9,6 +9,8 @@ > > #include > #include > +#include > +#include > #include > #include > #include > @@ -1866,6 +1868,18 @@ static int nxp_serdev_probe(struct serdev_device *serdev) > return err; > } > > + if (of_graph_is_present(dev_of_node(&serdev->ctrl->dev))) { > + struct pwrseq_desc *pwrseq; > + > + pwrseq = devm_pwrseq_get(&serdev->ctrl->dev, "uart"); > + if (IS_ERR(pwrseq)) > + return PTR_ERR(pwrseq); > + > + err = pwrseq_power_on(pwrseq); > + if (err) > + return err; > + } > + > /* Initialize and register HCI device */ > hdev = hci_alloc_dev(); > if (!hdev) { > -- > 2.50.1 > >